Fix harmless warning about uninitialized variable in fswatcher sample.

Just always initialize it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73021 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/fswatcher/fswatcher.cpp

@@ -420,7 +420,7 @@ void MyFrame::OnRemove(wxCommandEvent& WXUNUSED(event))
     if (idx == -1)
         return;
 
-    bool ret;
+    bool ret = false;
     wxString path = m_filesList->GetItemText(idx).Mid(6);
 
     // This will tell wxFileSystemWatcher whether to dereference symlinks